Source: https://www.researchgate.net/profile/Padmalini_Singh2/publication/353433066_Alternative_Strategies_to_Avoid_Layoff_in_Airlines_Industry_During_the_Covid-19_Pandemic/links/61c9a63bb8305f7c4b04a175/Alternative-Strategies-to-Avoid-Layoff-in-Airlines-Industry-During-the-Covid-19-Pandemic.pdf